A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5855-01-040-3882
NSN 6110-01-227-2617
NSN 5855-00-149-0766
NSN 5990-00-510-2098
NSN 5996-01-173-2339
NSN 5998-01-423-6253
NSN 6240-00-826-8426
NSN 5905-00-730-3965
NSN 5935-01-503-6924
NSN 6150-01-583-4028
NSN 5945-01-499-4897
NSN 6685-00-497-3577